diff options
| author | Horia Geantă <horia.geanta@nxp.com> | 2017-02-10 14:07:17 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-02-15 13:23:38 +0800 |
| commit | fd88aac93e4dc7810940e854be1c3dc5adb20120 (patch) | |
| tree | 36429035431b0fe7cfe8d30ff1f9b19c3b3dc1a2 | |
| parent | 4d8348d8e3bfc3e37f3cbaaff3966a1fca8909ed (diff) | |
crypto: caam - fix HW S/G in ablkcipher_giv_edesc_alloc()
HW S/G generation does not work properly when the following conditions
are met:
-src == dst
-src/dst is S/G
-IV is right before (contiguous with) the first src/dst S/G entry
since "iv_contig" is set to true (iv_contig is a misnomer here and
it actually refers to the whole output being contiguous)
Fix this by setting dst S/G nents equal to src S/G nents, instead of
leaving it set to init value (0).
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/caam/caamalg.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c index 662fe94cb2f8..05d4690351b9 100644 --- a/drivers/crypto/caam/caamalg.c +++ b/drivers/crypto/caam/caamalg.c @@ -1798,7 +1798,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc( gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC; - int src_nents, dst_nents = 0, sec4_sg_bytes; + int src_nents, dst_nents, sec4_sg_bytes; struct ablkcipher_edesc *edesc; dma_addr_t iv_dma = 0; bool iv_contig = false; @@ -1808,9 +1808,6 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc( src_nents = sg_count(req->src, req->nbytes); - if (unlikely(req->dst != req->src)) - dst_nents = sg_count(req->dst, req->nbytes); - if (likely(req->src == req->dst)) { sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_BIDIRECTIONAL); @@ -1818,6 +1815,8 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc( dev_err(jrdev, "unable to map source\n"); return ERR_PTR(-ENOMEM); } + + dst_nents = src_nents; } else { sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE); @@ -1826,6 +1825,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc( return ERR_PTR(-ENOMEM); } + dst_nents = sg_count(req->dst, req->nbytes); sgc = dma_map_sg(jrdev, req->dst, dst_nents ? : 1, DMA_FROM_DEVICE); if (unlikely(!sgc)) { |